Cart “JHEMCU F4-openlogger high-speed serial port black box” has been added to your cart. Continue shopping Remove item Thumbnail image Product Price Quantity Subtotal × SMA Male RF Coaxial Termination Matched Dummy Load 50 Ohm $3.49 SMA Male RF Coaxial Termination Matched Dummy Load 50 Ohm quantity $3.49 × JHEMCU F4-openlogger high-speed serial port black box $12.99 JHEMCU F4-openlogger high-speed serial port black box quantity $12.99 Coupon: Apply coupon Update cart Cart totals Subtotal $16.48 Total $16.48 Proceed to checkout — or —